Production processes used for making polyamide fiber woof

ABSTRACT

Polyamide fiber is used for its high resistance properties, where together with the described processes for producing polyamide fiber woof, the result is a strong, resistant and versatile material. There are two main processes for producing polyamide fiber woof: 1. Substituting the fine, cotton, transversal threads in the original polyamide fibre strong, secure, transversal sustaining stitching. 2. By the process of net woofing. The invention uses as its starting material, raw and vulcanized polyamide fiber weave. This is found as refuse from the process of manufacturing tires and seat belts. Polyamide fiber woof is suitable for use in clothes, shoes, jewels, jewelry, wigs and objects of decoration and art.

FUNDAMENTALS OF THE INVENTION

The invention refers to the processes used for the production ofpolyamide fibre woof. The processes uses raw polyamide fibre weave andvulcanized polyamide fibre weave. These fibre weaves are fabricated bythe polymer producing industries. The polyamide fibre weaves areoriginally produced in order to be used in the fabrication of seatbeltsand the inner parts of tires. Polyamide fibre has a very high resistanceindex and for this reason, is used for making products that need towithstand high levels of traction.

However, although the longitudinal polyamide fibre threads in thepolyamide fibre weave are highly resistant, the transversal compositionof the weave is made of tenuous cotton threads, of low resistance. Dueto this fact, the polyamide fibre weave tends to come undone with time.And for this reason, without further processing, the use of the weave islimited. But by removing the tenuous, cotton threads and using just thepolyamide fibre threads, the highly resistant threads can be used invarious areas, such as fashion and decoration. Within the polymerproducing industries, every polyamide fibre weave has to go throughquality control procedures. Any defects result in the rejection anddiscarding of the weave, creating off spec products.

This refuse, therefore, appears to be an inherent part of the productionsystem.

With the objective of utilizing these highly resistant fibres refuse,which are largely and usually seen in these systems, a process wasdeveloped, by which raw and vulcanized polyamide fibre weave istransformed into polyamide fibre woof, in sense of to identify the bestand more suitable utilization for these refuses.

This thus opens up new possibilities for the utilization of these fibresand also for reducing the serious problems of accumulation of industrialwastes.

SUMMARY OF THE INVENTION

Polyamide fibre woof is made using raw or vulcanized polyamide fibreweave, made by the polymer producing industries, for use in thefabrication of seatbelts and the inner part of tyres, specially the offspec grades.

Polyamide fibre woof is then created, by either a process ofsubstituting the tenuous, cotton, transversal threads for strong,sustaining, transversal stitching, or by a process of woof netting.

Polyamide fibre woof as produced by these invented processes has theimportant characteristic of being highly resistant. This is due to thehigh resistance of the polyamide fibre threads, together with theprocesses used for making the woof. Consequently, the woof can be usedin areas such as clothing, bags, shoes, jewelry, jewels, wigs,decoration and art.

DEFINITIONS

As used here, the term “raw polyamide fibre weave”, is defined as aweave made of longitudinal, polyamide fibre threads, interwoventransversally with fine, tenuous, cotton threads. As used here, the term“vulcanized polyamide fibre weave”, is defined as raw polyamide fibreweave that has been immersed in a mixture of latex, resourscinal,formoldine and ammonia, adding a coating to the raw polyamide fibreweave.

As used here, the term “transversal sustaining stitching”, is defined asstrong, secure, transversal stitching that holds together thelongitudinal, polyamide fibre threads. This stitching is done over anindividual, transversally placed polyamide fibre thread and is donemechanically, using a sewing machine. For this, please see details inthe figure number 1.

As used here, the term “woof netting” is defined as a process for makinga handmade, netted woof. The netted woof is a structure of threads,connected by a braid and joined by knots. See FIG. 4

As used here, the term “clothing” includes any types of clothing, suchas dresses, bermudas, coats, and others, as well as shoes.

BRIEF DESCRIPTION OF THE FIGURES

In FIG. 1, we can see the structure of individual, longitudinal fibresof the weave; 1. With fine, cotton threads woven between them; 2. With asingle, polyamide, fibre thread being placed transversally over thelongitudinal threads; 3. Being placed on the sewing machine; 4. With thetransversal sustaining stitching being applied, replacing the fine,cotton threads, the result, as shown in FIG. 2.

In FIG. 3, we can observe a fibre braid from which 1. The individualfibre threads are connected 2. And will be connected between themselves,by knots, forming a sequential chain, the result as shown in FIG. 4.

DETAILED DESCRIPTION OF THE PROCESS

There are basically two processes for producing a polyamide fibre woof;a manual process and a mechanical process.

By the mechanical process, polyamide fibre woof is made by substitutingthe tenuous, cotton, transversal threads in the raw and vulcanizedpolyamide fibre weave, for secure, transversal, sustaining stitching,using a sewing machine.

The transversal, sustaining stitching is achieved by placing anindividual, fibre thread transversally over the longitudinal fibres andfixing it with a sewing machine, using a strong, thick stitch.

The sustaining transversal stitching is applied at regular distancesapart. This distance varies between four to fifteen centimeters,depending on the piece to be made.

In the manual method, the netted polyamide fibre woof is made withindividual, polyamide fibre threads, connected by knots in a regular,repetitive way, like a fish net.

Under these two basic processes, the examples which follow, demonstrateall the production processes used for making polyamide fibre woof.

EXAMPLE 1

Producing polyamide fibre woof by the mechanical method: Firstly, apiece of raw or vulcanized polyamide fibre weave is cut to the sizerequired for the piece to be made. The weave is only cut widthways,following the direction of the transversal, cotton threads.

The weave is extended widthways on the sewing machine. One fibre threadis placed over the weave in the direction of the transversal, cottonthreads. The sewing machine is then used to stitch it, with strong,secure, sustaining transversal stitching. See FIGS. 1 and 2.

The transversal sustaining stitching is run the whole width of theweave, on both sides and is repeated at regular intervals, between fourto fifteen centimeters, depending on the piece to be made.

After applying the transversal sustaining stitching, the remainingtenuous, transversal, cotton threads are picked out and removed. Thewoof is now complete and ready for making the desired piece.

EXAMPLE 2

Producing polyamide fibre woof by the mechanical method, with lining: Apiece of raw or vulcanized, polyamide fibre weave is cut to the requiredsize. A piece of equal sized material is also cut, to be used as thelining. The weave is placed over the material, width ways on the sewingmachine. The transversal sustaining stitching is then completed as inexample one. However, this time, the stitching also goes through thelining, attaching it to the polyamide fibre weave.

EXAMPLE 3

Producing polyamide fibre woof by the manual method: polyamide fiberwoof is created by unweaving the piece of raw or vulcanized, polyamidefibre weave, putting the individuals threads on tress, fixed in aparallel way and in a continuous space, in order to be linked by knots,as a net.

The knots are made at the mid-distance between the two threads used inthe knot. The knots are also made at the same distance down the lengthof the thread on the two threads. The distance between the knots isdecided, so that it can be maintained in making the woof.

EXAMPLE 4

Producing polyamide fibre woof by the manual method, using gems: Thenetted woof is produced as described in example three.

However, in this case, gems are inserted into the knot spaces. The sizeof the knot space is made relative to the distance to the mid-pointbetween the two threads used in the knot. The size of the knot space forthe gems, as well as the distance between the knots, is maintainedregular and symmetrical, throughout the woof.

This procedure is repeated to the inferior rows, making the sequence ofknots of the whole woof.

1. Process for the production of polyamide fibre woof, using the refuseof raw or vulcanized polyamide fibre weave, characterized bysubstitution of transversal cotton threads in the weave for secure,transversal sustaining stitching, done with a sewing machine whereinsaid transversal sustaining stitching has a base of a transversallyplaced fibre thread and runs the whole length of the woof, saidtransversal sustaining stitching is repeated at regular distances apart,the distances being determined by the design of the piece to be made,and after sewing said transversal sustaining stitching, said cottonthreads are picked out and removed.
 2. Process for the production ofpolyamide fibre woof according to claim 1, characterized by manuallyinterlinking individual fibre threads sequentially with knots. 3.Process for the production of polyamide fibre woof according to claim 2,characterized by regular and symmetrical knot spacing to accept gemsinserted into the knot spaces.
 4. An article formed by the process ofclaim 1.